Safety device for feed-rolls.



I. A. FROSSARD.

SAFETY DEVICE FOR FEED ROLLS;

APPLICATION FILED AUG.22. 19:16.

Patented Nov. 6, 1917.

t@ wr JOHN A. FROSSARD, F PEPPERELL, MASSACHUSETTS.

SAFETY nEvIcE ron FEED-noms.

. Specification of Letters Patent.

retreated Nev. c, iai 7.

Application led August 22, 1916. Serial N o. 116,361.

To all whom zt may concern.'

Be it known that l, JOHN A. FnossARD,

, a citizen of the United States, residing at Pepperell, in the countyof Middlesex and State of Massachusetts, have invented new and usefulImprovements in Safety Devices for Feed-Rolls, of which the lfollowingis a specification.

This invention relates to safety devices for feed rolls and moreparticularlyfor rolls used on paper calendering machines. In suchmachines it is necessary that the pa er be fed into the rolls by handduring which time said rolls are rotating at a very high rate of speed.Unless used in this operation t e operator is very likely to get hislingers caught between said rolls and be badly mutilated.

The object of this invention is to provide a simple, inexpensive andeiicient device including a guard adapted to be placed in front of eachset of rolls of the machine, permitting the operator to insert hisfingers between the rolls far enough to guide and feed the paper untilthe same is caught and rotated by said rolls, without in the leastendangering his hand and absolutely preventing his etting caught by saidrolls.

Another ject of the invention is to provide means for regulating theadjustment of the guard relatively to said rolls and prevent said guardfrom being inserted between said rolls far enough to 'be caught thereby.

rlhe invention consists in the combination and arrangement of parts setforth in the following specification and particularly pointed out 1n theclaims.

Referring to the drawings:

Figure 1 is a vertical section taken through a paper calenderingmachine, illustrating portions of three rolls of said machine in sectionwith a device embodying my invention shown in connection therewith.

Fig. .2 is a plan view of one of the safety devices illustrated in Fig.1.

Like numerals refer to like parts in both views of the drawings.'

in the drawings 3, 4 and 5 preferably represent the rolls of acalendering machine and S a strip of paper which is to be calendered bysaid rolls. The rolls 3, e and 5 may be mounted in any suitable manneror in accordance with the usual method of mounting rolls in calenderingmachines, these movable slightly relatively to each v'eat precaution isother so as to provide suitable pressure upon said paper, said rollsbeing supported in side frames 7 and 8.

The device embodying my invention includes a support 9 preferablyconsisting of an angle bar 10, one of which is arranged longitudinallyof each pair oi' rolls and in front of said rolls, said bar beingsupported at opposite ends by brackets 11, 11 adjustably secured to theside frames 7 and 8. The bars 10 are adjustably secured by meanskofclamping plates 12, 12 to said brackets 11 and they are furtherpositioned with respect y to said rolls by stops 13, 13. Each of theangle bars 10 is arrangedwith one leg substantially horizontal as at 14and directed toward the pair of rolls in front of which said angle baris supported.

4To one face of the leg 14 of said angle bar a plurality of guards 15,15 are secured preferably screws 16, 16 extending b through the lieg 14of said angle bar and said guards and into a strip of Wood 17 whichextends substantially the length of said series of guards. The guards 15are furthermore preferably formed of resilient sheet materia such as berand are disposed between their res ective rolls; the inner ends 18 ofsaid guar s may extend as far into the crease or space 19 between thepair of rolls in front of which said device isarranged as will bepossible without touching either of said rolls.

In the present instance the edge 18 is slightly nearer the lower rollthan the upper roll, thus providing ample space for the paper 6 to beinserted between the end of said guard and the upper roll. Means arepro-l vided along the edge 18 preferably consisting of a ridge 20forming a shoulder 21 the convex sur ace of said ridge being disposedtoward the paper 6 so as to provide a smooth edge adapted to assist ininserting the paper between the rolls.

The shoulder 21 is arranged in such a position relatively to the upperroll that when the 'fingers of the operators hand are inserted betweensaid rolls, the nails of said lingers contact with said shoulder andprevent a further insertion there-of between said rolls therebypreventing said ngers from contacting with both ofthe rolls of the pair.

The position of the lingers at this time is illustrated in dotted linesin the lower left hand portion of Fig. 1 in which position the iswithdrawn a s ight distance ,paper 6 is being fed to the rolls 4 and 5it having already been fed to the rolls 3 and 4, said rolls beingarranged to turn in the direction of the arrows, (1,0, and b, b. Thespace shown at 22 is ample for inserting the paper over the ridge 2O andbetween the two rolls adjacent thereto, but this space is too small topermit the fingers of the operator to be inserted therethrough, and inconsequence of this arrangement it will be iinpossible for the operatorto move his ngers so that they will engage both of the rolls, but whensaid fingers are engaging but one of said rolls and a stationary device,as for instance the guard 15, no possible harm can result.

When the safety device' is being placed in position in front of itsrespective pair of rolls and the stops 13 have not been properlyadjusted there is great danger of inserting the ridged end 'of theguards 15 so far between the rolls that said guard will be cau htthereby and carried through said rolls, t us destroying said device. Toguard against this possibility a series of stops 23, 23 have beenprovided which are preferably secured to resilient members 24 Which, inturn, are attached to the leg 14 of each of the angle bars 10 by screws25.

These stops are provided with rounded faces 26 and so placed withrespect to the guard members 15 that as said safety device is beingplaced in position in front of its respective pair of rolls the roundedportion 26 thereof will contact with 'the adjacent face of the rollthereabove before the ridge 2O has a chance to engage both the rollsabove and below the same and after said stop 26l has enga ed the rollthereabove it sufficient to permit the paper 6 to pass between therounded end 26 thereof and the roll nearest to said stop. L

The stops 23 are narrow as will be seen by referring to Fig. 2, and atsubstantial distances apart to permit the operators hand to be insertedbetween said stops until his finger nails, engage the shoulder 21, therounded surfaces 26 being so arranged that they assist in the insertionof the paper between said stops and said rolls.

As previousiy stated, the invention is broadly adapted for use inconnection with paper calendering machines, although it is to beunderstood that the same is not limited to such an application but maybe applicable to any machine employing feed rolls where-7 in the worlris fed to said rolls when the saine are in operation.

Furthermore, the guard members are preferably formed of resilient sheetmaterial which are ridged at the free edges thereof and pressed topresent a convex surn face to the roll against the surface of which thepaper is in contact, but other forms of guard may be employed capable ofaccomplishing the same result without departing from the spirit andscope of the invention.

Having thus specifically described my invention what I claim and desireby Letters Patent to secure is:

l.-The combination of a pair of feed rolls, a guard disposed betweensaid rolls and yieldable relatively thereto, and a ridge arranged alongthe edge of said guard adjacent to said rolls and extendingsubstantially the full length of said rolls adapted to prevent theinsertion of the operators lingers between said rolls during the feedingof the material thereto.

2. The combination of a pair of feed rolls, a guard yieldingly mountedbetween and directed toward said rolls, and a ridge formed along theedge of said guard adjacent to said rolls, said ridge being of uniformshape substantially the length of said guard and constructed andarranged to be engaged by the nails of the operators iingers to preventsaid lingers from being drawn between said rolls.

3. The combination of a pair of feed rolls, a guard yieldingly mountedadjacent to said rolls, adapted upon yielding to contact with one ofsaid rolls, said last named roll forming a stop to limit the distance towhich said Guard can move 'when yielding, and means isposed along theedge of said guard adjacent to said rolls adapted to prevent theoperators i'ingers from being drawn between said rolls.

4. The combination of a pair of feed rolls, a support disposedlongitudinally and iii front of said rolls, said support beingadjustable toward and from said rolls, a guard mounted on said supportdirected between said rolls, and means yieldingly mounted on saidsupport adapted to engage one of said rolls to limit the insertion ofsaid guard between said rolls.

5. ln combination, a pair of feed rolls, a support arran edlongitudinali and in front of said eed rolls, a plura ity of resilientguard members secured side by Vside to said support and directed betweensaid rolls, and means disposed adjacent to the edges of said guardmembers adjacent to said rolls adapted to pre-vent the operators ngersfrom being drawn between said rolls during the feeding of papertherethrough.

6. ln combination, a pair of feed rolls, a support disposed in front ofsaid feed rolls and adjustable toward and from said rolls, a guardmounted upon said support and directed between said rolls1 and stopsyield ingly disposed at intervals along said sup'- port, said stopsbeing constructed and arranged to prevent the insertion of said guardbetween said rolls,

7. In combination, a pair of feed rolls, an operators fingers fromcontacting with both 10 an 1e bar arranged in front and longitudiof saidrolls. nay of said rolls, one leg of said angle bar In testimony whereofI have hereunto set being directed toward said rolls, a yieldable myhand in presence ef two subscribingwit- 5 guard member secured to saidleg and dinesses. -l

rected toward said rolls, means for securing JOHN A. FROSSARD. saidguard to said bar, and a ridge disposed Witnesses: longitudinally of theedge of said guard ad- SYDNEY E. Tm, v jacent to said rolls adapted toprevent the HA'rrm E. SrRATroN.

